舰船尾流回波信号建模与仿真

Modeling and Simulating of Ship Wake Echo Signal

关于舰船尾流信号准确性估计可以实现对跟踪目标的确认。针对舰船尾流回波信号是分布在尾流中大量气泡散射入射波而产生的体积混响,提出用舰船尾流回波信号声物理模型,实现了对舰船尾流回波信号的数学建模。根据气泡的声学特性和在尾流中的分布规律,分析了尾流回波信号的声学模型,并利用声学模型、FOM混响理论模型和尾流回波信号统计建模方法,建立了尾流回波信号的数学模型。通过Matlab仿真,结果的功率谱与概率密度的分布情况,以及仿真结果与实航尾流回波信号的比较,验证了尾流回波信号模型的有效性和准确性。为研究尾流回波信号处理和检测提供了科学依据。

Based on the acoustic model of ship wake signal,the modeling and simulating methods of the mathematic wake echo signal are designed.The ship wake echo signal is volume reverberation as a result of mass bubbles scattering the incident wave.According to the acoustic features and distribution rule of the bubbles within ship wake and the scattering cell modeling method,the acoustic model is analyzed.A mathematic wake echo signal model is constructed by utilizing the acoustic model,FOM reverberation statistical model and wake echo signal statistical modeling method.The power spectrum and probability density of simulation results,the agreement between the simulation results and sea trial ones prove the availability of the wake echo signal mathematic model.It is useful for studying ship wake echo signal processing and detecting.